560 Paläontologie; Paläozoologie
Refine
Language
- French (21) (remove)
Has Fulltext
- yes (21)
Is part of the Bibliography
- no (21)
Keywords
- Ammonites (1)
- Biostratigraphy (1)
- Holocene (1)
- Massif armoricain (France) (1)
- Palaeoloxodon antiquus (1)
- Paleontology (1)
- Toarcian (1)
- interglacial (1)
- paleoflora (1)
- peat bog (1)
Analyse d'un exemple de fossilisation d'une trace de pas de Dinosaure (Lias inférieur des Causses)
(2003)
A calcareous block made of algo-laminated (stromatolitic) material exhibits at its upper surface a foot print of a Dinosaurian. A vertical section (sawing) and a thin section allow to make detailed observations. The early diagenesis permits the preservation of the deformations caused by the foot print.
Comparaison des ichnopopulations des Grands Causses (Sud de la France) et du Veillon (Vendée)
(2003)
From descriptive statistic method concerning length (L), width (W) and L/W, it is suggested that Grallator variabilis samples from Vendée (Le Veillon) and Grands Causses belong to the same ichnospecies. Also, by this way, G. maximus of Hettangian of Vendée could be synonym of G. minusculus from USA Hettangian.
Following the 1989-90 winter storms, remains of several straight-tusked elephants as well as a rich quaternary paleoflora were found on the strand of La Parée beach in Brétignolles-sur-Mer (Vendée, France). The story of these findings, the diggings of the bones, the dating and the paleoenvironment of the deposits are mentioned in this article. The sediments are old "peat bogs" which belong to two distinct eras : Pleistocene (peat bog holding the remains of straight-tusked elephants) and Holocene (peat bog showing tracks of Bovidae and prints of tools, and higher peat bogs).
On the intertidal zone of Le Veillon at Talmond-Saint-Hilaire (Vendée, France), in 1963 Gilbert Bessonnat discovered traces of vertebrate footprints in a Hettangian formation. On March 28th & 29th, at this site a study session was held on the theme: "sites with vertebrate footprints on the Triassic-Jurassic limit". Palæontologists, palæobotanists, sedimentologists, hydrologists, scientific historians and naturalists compared their results and projected further research. This exceptional Vendée heritage site is to be protected and developed.
The Veillon ichnofauna, early Liassic in age, includes various Reptile taxa: quadruped Pseudosuchian, Coelurosaurians, Theropods, primitive Iguanodon – like Ornithopods and some unspecified forms. This ichnofauna is very comparable to the early Liassic footprint assemblage of the Connecticut.
The Ichnospace is a specific exhibition dedicated to traces and tracks left by recent and fossil animals on ground. The Ichnospace is located at Luzech, a little town with a long historic past, near Cahors (about 17 km W) in the valley of the river Lot. Every living being leaves traces of its activities (habitat, locomotion, diet, etc.) in its environment. These traces are the signing of the individual and they may be preserved and fossilised in geological time. They provide information about biodiversity, the habits of individuals and their distribution in time and space. In the Causses of Quercy area very near of Luzech and well known by palaeontologists and geologists, many dinosaur and pterosaur tracks have been discovered. Some of them are exposed with various fossil invertebrates, turtles, crocodiles and so on, from upper Jurassic when the sea Tethys ran along shores of the large Central island. Movie and an audio-visual show complete the exhibited specimens with French and English comments.
In the inter/supratidal algal mats, the early diagenesis products a progressive induration. It is enough to preserve all the deformations affecting the mats, including footprints of vertebrates, tracks and burrows of small invertebrates, and physical actions (desiccation cracks).
Clastic deposits related to alluvial and estuarine environments sedimented during the early Liassic in the Veillon area (south of Talmont-Saint-Hilaire, Vendée, France). A reptile fauna including various taxa, just known by innumerable footprints, lived in that environment, in rather hot and dry climatic conditions.
Hettangian stratotype shows an example of preservation and valorisation of a scientifical historical place. Earth Story is understood thanks to geological heritage; this heritage is very vulnerable. Judicial framework and mentality evolution allow us to make a conservation of particularly interesting places.